What do the three-letter codes (mil, civ, ctr) in an email address mean?
windowsmacos
Symptoms
Users confused by addresses like first.m.last.mil@mail.mil vs first.m.last.civ@mail.mil.
Likely cause
DoD PIV Transitional Implementation Guide formats.
Fix
The code denotes employment category: .mil = uniformed military, .civ = DoD civilian, .ctr = contractor. There is no fix needed - it is informational only.
Sourced from militarycac.com. Rewritten for clarity.
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